深厚砂层下深基坑施工的实测分析_李钊_刘庭金

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1、第9卷增刊1地下空间与工程学报Vol．92013年10月ChineseJournalofUndergroundSpaceandEngineeringOct．2013*深厚砂层下深基坑施工的实测分析11，2李钊，刘庭金(1．华南理工大学土木与交通学院，广州510640;2．华南理工大学亚热带建筑科学国家重点实验室，广州510640)摘要:结合深基坑工程实测数据，详细介绍了深厚砂层地质条件下，深基坑施工给周边环境造成的影响，并分析了深基坑支护结构的受力与变形规律。分析认为，基坑开挖过程中，立柱沉降小，地下连续墙嵌入段水平位移较小。基坑支护结构体

2、系最大内力在砂层底面处附近出现。强风化岩中含有裂隙水将会对基坑支撑受力产生影响，本文应用理正深基坑软件分析手段，分别对强风化岩进行水土分算与水土合算来分析其对支撑内力所产生的影响。水土合算分析结果与工程实测数据比较吻合，表明强风化岩层采取水土合算较为合理，从而为实际工程的设计施工提供一定的理论和计算依据。关键词:深厚砂层;实测分析;水土合算中图分类号:O319．56文献标识码:A文章编号:1673-0836(2013)增1-1688-06MeasurementAnalysisonConstructionofDeepFoundationPit

3、inDeepThickSandLayer11，2LiZhao，LiuTingjin(1．SchoolofCivilEngineeringandTransportation，SouthChinaUniversityofTechnology，Guangzhou510640，China;2．StateKeyLaboratoryofSubtropicalArchitectureScience，SouthChinaUniversityofTechnology，Guangzhou510640，China)Abstract:Combinedwiththe

4、measureddataofdeepfoundationpitengineering，theauthorsintroduceindetailsthedeepsandgeologicalconditions，theimpactofthedeepfoundationpitconstructiontothesurroundingenvironment，andanalyzethestressanddeformationlawofthedeepfoundationpitsupportingstructure．Accordingtoanalysis，t

5、hepostsettlementandhorizontaldisplacementofembeddedpartofundergroundcontinuouswallissmallintheprocessoffoundationpitexcavation．Themaximuminternalforceoffoundationpitsupportingstructuresystemappearsnearthebottomofsandlayer．Itwillhaveimpactonthefoundationpitsupportforcewhens

6、trongweatheringrockcontainscrevicewater．Theauthorsappliedthedeepfoundationpitsoftwareanalysismethodforthestrongweatheringrocktoanalyzetheimpactoftheinternalforceonsupportbyseparatecalculationandcombinedcalculationofwaterandearthpressures．Thecombinedcalculationofwaterandear

7、thpressuresanalysisresultsandengineeringmeasureddataareconsistent，soforthestrongweatheringrocktotakecombinedcalculationofwaterandearthpressuresismorereasonable．Thisconclusionprovidescertaintheoreticalandcomputationalbasisforactualengineeringdesignandconstruction．Keywords:d

8、eepthicksandlayer;measurementanalysis;combinedcalculationofwaterandearthpressures*收稿日期:20